@article{Papa_2021, title={The city challenges and external agents. Methods, tools and best practices}, volume={14}, url={http://www.serena.unina.it/index.php/tema/article/view/8278}, DOI={10.6093/1970-9870/8278}, number={2}, journal={TeMA - Journal of Land Use, Mobility and Environment}, author={Papa, Rocco}, year={2021}, month={Aug.}, pages={121-123} }